Razor-blade-stropping device.



0. KAMPPE. RAZOR BLADE STROPPING DEVICE. APPLICATION FILED 1118.20.1909.

Patented Dec. 14, 1909.

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UNTTED sTATns PATENT orrron.

OTTO KAMPFE, OF NEW YORK, N. Y.

RAZOR-BLADE-STROPPING DEVICE.

To all whom 'it may concern:

Be it known that I, OTTO KAMPFE, a citizen of the United States,residing at the borough of Brooklyn, in the county of Kings, city andState of New York, have invented an Improvement in Razor-Blade-StroppingDevices, of which the following is a specification.

My present invention is an improvement upon the devices shown anddescribed in my application for Letters Patent of the United States,filed August 24, 1908, Serial No. 450,030, and the object of myinvention is the provision of a stropping device adapted to securelyhold during the stropping operation the thin flexible razor blades nowfound upon the market, in an eort to prolong the useful life of suchblades.

In the device of my present invention, as in the device of saidapplication, I prefer to employ a bent wire frame having rest bars andto so arrange the parts that the center of the blade holder is below anoperative plane passing through the centers of the rest bars,consequently when the instrument bears upon the strop the latter drawsstraight between its contact with the blade holder and either rest bar,and a very slight acute angle is produced by the strop line and a linethrough the blade, producing a fine tapering edge to the blade whensharpened.

In my present device a swinging rod is fulcrumed at one end to the frameor handle of the implement, which latter is composed in part of a metalplate and bent wire frame. A sleeve surrounds the pivot rod and carriesa roller bearing on the plate. Means are provided for limiting themovement of the sleeve and roller and for holding the roller downagainst the plate. The device for engaging and holding the thin flexibleblade comprises oppositely disposed jaw members having a spring actionand gripping function and adapted to receive between them the thinflexible razor blade and a guide plate advantageously employed inconnection therewith for centering the blade in the jaws, all of whichis hereinafter more fully described.

In the drawing, Figure l is a plan view representing the device of myinvention. Fig. 2 is a side elevation and section through the plate.Fig. 3 in exaggerated size is a cross section at the dotted line m, ofFig. 1. Fig. 4 of corresponding size is a cross it to turn.

Specification of Letters Patent. Patented Dec. 14, 1909. Applicationfiled February 20, 1909.

Serial No. 479,176.

section at the dotted line y, y, of Fig. l. Fig. 5 of corresponding sizewith Figs. 3 and t, is a cross section at the dotted line a, z, of Fig.l. Fig. G is a cross section through the stropping device andlongitudinally of the strop showing the blade holder as in Fig. 5 in astropping position. Fig. 7 is a plan representing the features of myinvention as applied to an all wire frame as disclosed in my aforesaidapplication. Fig. 8 is a longitudinal section and Fig. 9 a transversesection through the union of the sleeve and the blade holding jawsshowing a form of the invention. Fig. l0 is a plan of the blade holdingand locking plate.

Referring particularly to Figs. l to 7 inclusive, I employ a metal frameand a wire frame connected together. The metal frame part includes afoundation plate a with oppositely disposed trough-shaped members al atone end and a cap t2 secured to the other end. The plate a is slotted at2, is provided with lugs 3 and with notches Il. The wire frame comprisesthe diverging members Z), the inclined members 1, trough members b2 andthe transverse member b3. There are connecting parts between theinclined members 1 and trough members b2 which eX- tend through thenotches Zl of the plate metal frame and there are also connecting partsbetween the trough members b2 and the ends of the transverse member b3,and the transverse member passing over the surface of the plate a passesbeneath the lugs 3 which hold the same securely in position, togetherwith the holding function of the notches 4C.

I employ a swinging rod c connected by a pivot c1 to an opening in thefoundation plate a, or as in Fig. 7, to a circularly bent centralportion of the wire frame. An arm l is secured to the rod c and passesthrough the slot 2 of the plate a and beneath the plate, and a roller Z1is connected by a` pivot pin -to the lower free end of the arm d; theroller Z1 bearing against and moving over the under surface of the platea to prevent the rod c lifting. The rod o passes forward of the arm (ttoward the blade and the forward end thereof is surrounded by a sleeve eheld revolubly thereto by any desired mechanical device. I have shownfor this purpose a circumferential groove formed in the sleeve e nearthe arm (Z, the same on the under side entering a groove in the rod c.This retains the sleeve on the end of the rod and permits On the forwardend of this lsleeve e is a roller el which bears upon the upper surfaceof the plate a; the center of the plate beneath the roller beingperforated to receive a pin 5 secured in the roller and passing freelythrough the opening; the office of the said pin and aperture in theplate therefor being to turn the roller and the sleeve e with theswinging movement of the rod c. rlhe outer free end of the sleeve e iscut through longitudinally to form the jaws e2 and these jaws areprovided with oppositely disposed projections 6 forming the catches, andthe sleeve e is circumferentially grooved forward of the roller el, andI prefer in the structure shown in Figs. 1 to 7 inclusive, to placebetween the jaws c2 a block of rubber 7 acting as a spring to keep thejaws apart and compel them to perform their function with specialreference to the catches 6.

The blade holding device comprises a sleeve f, a. tube /L within thesleeve, within which are oppositely disposed slots 8 or openings adaptedwhen the parts are 1n their proper relation, to receive the catches 6 ofthe jaws e2, and I provide the end of the tube )L adjacent to the rollerel with projections 9, the free ends of which are advantageously bentdown into the circumferential groove in the sleeve e forward of theroller el; the same acting to prevent the sleeve and tube 72,accidentally coming away from its connection with the end of the sleevee.

Formed integrally with the tube z, are spring jaws i l slightly convexon their outer surface and consequently concave on the inner surface,with the concave portions oppositely disposed and the respective edgesof the arms almost meeting. These jaws are adapted to receive betweenthem a thin sheet metal razor blade Z and in order to hold the blade inposition, I prefer to employ a locking plate 7c provided with a free endL1 to be engaged by the ngers, and projections 10 so spaced apart as topass up into the usual holes provided in the thin metal razor blades Zupon the market, and which holes adapt the blade to lit over projectionsof the holder of the safety razor device for which they are made.

In the form of my invention shown in Fig. S, the free end of the sleevee3 is provided with oppositely disposed slots for the spring catch-wires11. These are the equivalent of the catches 6, they are of tapering formand at their higher ends adapted to enter the inner grooves or slots 8of the tube 7L to constitute a securing device for the holding of thesheet metal jaws to the sleeve c.

In the form of my invention shown in Fig. 7, I have adapted the featuresof this invention to the wire fralne shown and described in my aforesaidapplication for Letters Iatent, and except for this wire-frameconstruction and the plate which extends across between the side membersthereof and forms the substitute for the connecting part of thefoundation plate a, all the other parts described are the same and carrythe same letters and numerals of reference.

Fig. 6 illustrates the position of the diverging members b of the frame,the sheet metal razor blade and the blade holding jaws with reference toa strop, it being possible for the strop to contact with one of themembers Z) and the under surface of one spring jaw c', or if the stropis held sulficiently loose, the strop may contact with an under surfaceof both diverging members Z) as well as the under surface of one springjaw, and as the stropping device is moved up and down the strop, aslight swinging movement is given to the sheet metal razor blade by theswinging of the rod 0 and the partial turning of the roller el and theaction produced thereon by the pin 5, so that first one edge of therazor blade and then the other are brought into position to sharpen thesame and produce a fine tapering edge.

I prefer in the device of my present invention to arrange the bladeholder so that the back thereof with reference to the longitudinal axisof its operating rod, is at an obtuse angle as disclosed in reissuedLetters Patent qll-12,164, granted-to F. R. and O. Kampfe, October 27,1903.

I claim as my invention:

1. A razor blade stropping device for thin flexible normally fiatblades, comprising a frame to be grasped by the hand, an arm pivotallymounted in said frame and adapt-- ed for a swinging movement, a sleeveconnected to and revoluble upon the free end of said rod, jaws adaptedto receive a thin flat flexible blade, means for holding the bladebetween the jaws, means for removably connecting the jaws to the freeend of said sleeve, means for locking the said jaws to the end of saidsleeve, and devices connected to the frame and adapted to bear upon thesurface of a strop.

Q. A razor blade stropping device for thin flexible normally fiatblades, comprising a frame to be grasped by the hand, an arm pivotallymounted to said frame and adapted for a swinging movement, a sleeveconnected to and revoluble upon the free end of said rod, jaws adaptedto receive a thin flat flexible blade, means for holding the bladebetween the jaws, means for removably connecting the jaws to the freeend of said sleeve, means for locking the said jaws to the end of saidsleeve, devices connected to the frame and adapted to bear upon thesurface of a strop, and means for imparting a limited swinging movementto said jaws and blade.

3. A razor blade stropping device for thin flexible normally flatblades, comprising a frame to be grasped by the hand, an arm pivotallymounted to said frame and adapted for a swinging movement, a sleeveconnected to and revoluble upon the free end of said rod, meansconnected to the rod and adapted to hold the same down to apredetermined position, a roller connected to said sleeve at its freeend and adapted to bear upon the surface of the frame with a rollingmotion, means for limiting this motion, a sleeve adapted to pass overthe free end of the aforesaid sleeve, and a spring acting device forholding the parts together and preventing accidental displacement, andjaws formed with the sleeve and adapted to receive between them a thinflexible normally flat blade to be sharpened.

4:. A razor blade stropping device for thin flexible normally fiatblades, comprising oppositely disposed slightly curved springjawsreceiving a blade, a swinging support for said jaws and means forremovably connecting the. same therewith, a frame to which said supportis connected and a plate having parts adapted to engage the blade to besharpened and to fit with the blade between the jaws.

5. A razor blade stropping device for thin flexible normally flatblades, comprising a frame, a pivotally connected swinging arm securedto said frame, a revoluble member upon the free end of said arm, springcatches on the free end of said sleeve, jaws adapted to receive theblade to be sharpened, a sleeve at one end of said jaws adapted to fitover the free end of the aforesaid sleeve and having recesses adapted toengage the catches thereof, and means acting to prevent the accidentalseparation of said jaws and sleeve from the revoluble sleeve.

6. A razor blade stropping device for thin flexible normallyflat'blades, comprising a frame, a pivotally connected swinging armsecured to said frame, a revoluble member upon the free end of said arm,springcatches on the free end of said sleeve, jaws adapted to receivethe blade to be sharpcned, a sleeve at one end of said aws adapted tofit over the free end of the aforesaid sleeve and having recessesadapted to engage the catches thereof, a circumferential groove on therevoluble sleeve adjacent to the end catches and projections on thesurrounding sleeve adapted to be bent down in said groove to prevent theaccidental separation of the parts.

7. In a razor blade stropping device, a foundation plate havingtrough-shaped opposite members, a wire frame having diverging membersadapted to bear upon a strop, inclined members, trough members, atransverse member and connecting parts, lugs upon the foundation plateadapted to engage the transverse member of the wire frame, and notches lat the corners of the trough members of the foundation plate adapted toengage other parts of the wire frame and so hold the wire frame in afixed relation to the foundation plate.

S. In a razor blade stropping device, a foundation plate havingtrough-shaped opposite members, a wire frame having diverging membersadapted to bear upon a strop, inclined members, trough members, atransverse member and connecting parts, lugs upon the foundation plateadapted to engage the transverse member of the wire frame, and notchesfl at the corners of the trough members of the foundation plate adaptedto engage other parts of the wire frame and so hold the wire frame in aixed relation to the foundation plate, the said oppositely disposedtrough members having high sides which in the operation of the stroppingdevice become finger rest-s.

Signed by me this 16th day of February 1909.

OTTO KAMPFE.

Titnesses GEO. T. PINCKNEY, E. ZAGHARIASEN.

